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Placer Deposits of Alaska 1973


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Placer Deposits of Alaska by Edward H. Cobb (USGS)

1973 USGS Bulletin 1374, 14.97 MB pdf file, 219 pages

An inventory of the placer mines and prospects of Alaska, their history and geologic setting.

Gold Panning, Sluicing, Dredging, Drywashing Forum


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    • By Steve Herschbach
      I saw this video posted by Chicago Ron about his visit this summer to the AKAU operation in Nome. From YouTube:
      “1 week trip to Nome Alaska with 7 other hunters. We tried everything they had. 2 days working the slick plate, groups of 2 for half a day. High banking and panning, and lots of detecting tailing piles that had been pushed with a dozer. Mike got the find of the trip with a 7.93 ounce specimen worth well over 20K. I had the most nuggets with 7 and we all got gold and had a blast! Already planning the return trip End of July 2022”
      Nome Alaska Gold Hunt August 2021 Warning Adult Language!
       
    • By Reno Chris
      I also am back from Alaska, although its from a different part of the state than Steve was in. 
      I am back from Gold King Creek, about 50 miles south of Fairbanks. It was quite an adventure. They run an operation for tourists as well as running a regular commercial scale operation at the same time. I did metal detecting and shoveled gravel into a highbanker. Shoveling gravel is taxing and  with my back still only at about 90% from my car accident, after a couple weeks of shoveling all day my back was in sore shape. I balanced off shoveling by metal detecting. I found 179 pieces of gold while I was there, but the total weight for all my detected gold was only 5.2 grams. The gold from Gold King is small (as is common for many Alaska placers). Now don't get me wrong, I had a ball detecting all of those 179 pieces, and there are a few rare larger bits in the area. One lady found a nugget of about 3.5 grams before we arrived with an SDC 2300 - very unusual. I think the biggest the commercial operator got while I was there was about a gram, and that is from 65 ounces he produced in the two weeks I was there. My biggest was about 0.2 grams, and average for the 179 pieces was about 0.03 grams. That's a testimony to the sensitivity of the GM 1000.  I did get some good gold by shoveling into the highbanker also. The gold does not occur on a real bedrock but on a hardpan of deep clay, real bed rock is 180 feet down and likely has no significant gold ( based on where the gold is coming from). Overall, I think it was a big success, I really enjoyed myself, the folks who went in with me had a great time, and I got to meet a lot of new folks, including some of the staff who were avid detector prospectors from Arizona. On trying to depart, I got stuck there for a day by low fog - which prevents planes from flying in. Very normal for an Alaskan prospecting adventure. I've now taken care of the things I need to do for the ICMJ magazine and am getting back on track to take care of all the other things that go with life here in the lower 48. There will be an article in the ICMJ on it with a lot more detail for those who subscribe, and I have a video about working on hardpan or false bedrock on my Youtube channel.








    • By Steve Herschbach
      This gold prospecting and metal detecting story takes us all the way back to the beginning - my beginning that is.  I was fortunate enough to be born in the Territory of Alaska in 1957. Alaska was still very much on the frontier back in those days. My father was a farm boy from the midwest who headed for Alaska in the early 50's with not much more than an old pickup truck. He worked as a longshoreman offloading ships in Seward, Alaska for a time. He decided to get some education, and earned his way through college in Fairbanks, Alaska, by driving steampipe for the fleet of gold dredges that were still working there. He spent some time in Seldovia, Alaska, working the "slime line" in a fish cannery. He met my mom in Seldovia, the two got married, and finally settled in Anchorage, Alaska.
      I came along in 1957. My father had taken a job as a surveyor but money was tight in the early years. I was raised on wild game and garden grown vegetables, and as soon as I was old enough to handle it, I was walking a trapline every winter with my father. Dad was a hard worker, and Alaska was having one of its many booms at the time - the construction of the oil and gas fields in Lower Cook Inlet. This was the Swanson River oilfield, discovered the year I was born.
      The state was prospering, and my father along with it as a surveyor on the new Swanson Field. He got the bug for flying early on, and by the time I became a teenager he finally got his dream plane at the time - a Piper Super Cub, the classic Alaska Bush airplane. Super Cubs equipped with oversize "tundra tires" can land just about anywhere you can find about 300 - 400 feet of open ground. A great little airplane and the one I ended up flying to get my own pilot's license.

      Super Cub N1769P parked on knoll in Talkeetna Mountains, Alaska
      It was in this same timeframe that dad got me hooked on gold prospecting. In 1972 I saw an ad in a magazine "Find Lost Treasure" and had acquired my first metal detector, a White's Coinmaster 4. This must have got discussions going about gold, and my father did have some knowledge on the subject having worked around the gold mines in Fairbanks. He took me to a little creek south of Anchorage, Bertha Creek, and I found my very first flakes of gold! By the ripe old age of 14 gold fever was in the air, I had my first metal detector, and already wanted a gold dredge. My first dredge, a 3" Keene with no floatation, was on the way to me in 1973.
      Keep in mind that the price of gold had only recently been deregulated from the old fixed price of $35 per ounce. In 1972 it was around $60 per ounce, and in 1973 made it to just over $100 per ounce. The money was not my motivation at all. I already just loved finding gold, and the connection to the prospectors of old and the historical quest for gold were more compelling than any dream of striking it rich. I just wanted to find gold!

      My first metal detector and first gold dredge (my 3502 had the older aluminum header box & a power jet)
      A young man with a new detector, new gold dredge, gold fever, and a father willing to fly him anywhere in Alaska on adventure. How great is that? Now there was only one problem - where to go? There was no internet then, so it boiled down to libraries and research. In short order I discovered the United States Geological Survey (U.S.G.S.) bulletin series and the number one Alaska title of the series, Placer Deposits of Alaska, U.S.G.S. Bulletin 1374 by Edward H. Cobb. This one book and the references contained in it became my prospecting guide to Alaska. My desired target? Remote locations with large gold nuggets!
      I read the book and certain places just jumped out at me. One was the Iditarod area and places like Ganes Creek and Moore Creek - tales told elsewhere. This paragraph of page 114 caught my eye:
      "Placer mining in the Chisana district, first of creek gravels and later of bench and old channel deposits of Bonanza and Little Eldorado Creeks, has always been on a small scale with simple equipment. The remoteness of the area, shortages of water on some streams, and the small extent of the deposits all prevented the development of large operations. There has been little activity since World War II; the last reported mining was a two-man nonfloat operation in 1965."
      Wow, that alone sounds pretty good. Nothing really about the gold however. The secret to the Placer Deposits series is not so much the books themselves, though they are great for getting ideas, like I did. The key is to use the references listed and in this case the main one is The Chisana-White River District, Alaska, U.S.G.S. Bulletin 630 (1916) by Stephen Reid Capps.
      It turns out I had stumbled over the location of the last actual gold rush in Alaska in 1913. It was a small rush and did not last long, but it did mark the end of an era. The world was on the brink of war and the age of gold rushes was soon to be history. The history of the area is covered in the report starting on page 89. It is fascinating reading, but it was this note on page 105 that really sealed the deal:
      "The gold is bright, coarse, and smoothly worn. The largest nugget found has a value of over $130, and pieces weighing a quarter of an ounce or over make up about 5 per cent of the total gold recovered. The gold is said to assay $16.67 an ounce."
      Gold nuggets a quarter ounce or larger make up five percent of the gold? And that $130 nugget at $16.67 an ounce? Somewhere over seven ounces. That's all I needed to know. Very remote, worked by simple means, and large gold - I wanted to go to Chisana in general and Bonanza Creek in particular. Even the creek names scream gold - Bonanza Creek, Big Eldorado Creek, Little Eldorado Creek, Coarse Money Creek, and Gold Run. Now all we had to do was get there. But when I said remote, I meant remote. Chisana is practically in Canada 250 air miles from Anchorage.
      To be continued.....

      Chisana, Alaska location map
    • By Sasquatch
      Last weekend I made the drive from Anchorage up to the Taylor Highway and past Chicken to the Jack Wade public gold panning area.  Look up Steve’s excellent posts on the area for more descriptions and pictures of nuggets, no gold on my trip.
      It’s still pretty early so Chicken wasn’t even open yet and some ice shelfs were still along sections of the creek. Got great weather, just some passing downpours but in a T-shirt with no mosquitos most of the time.  I did take waders to cross the creek,as it was running a little high with snowmelt.
      This was the first trip I dedicated a lot of time as a serious search for gold and was just as much about learning the detector.  Mostly I have worked beaches, campsites, a few roadsides, so I know it can find the tiniest bits of melted aluminum can, bullets and coins.
      As expected I dug a lot of trash, but I did find some interesting nuggets that are definitely not gold.  Most are iron based, magnetic, but a couple look very noduly, and one is not magnetic. The others are probably just rusted bits of iron.  There were some sparkles I thought might be pyrite but I think is just dust from the surrounding shist as even the nails and bits of wire sparkle under the right light. Take a look at the pics and see what you think, maybe just welding or torch cutting remnants. They were all in the same area.
      The area has been heavily worked by detectorists with lots of dig holes around.  Equally lots of unexplored tailings but many so overgrown that swinging a detector is impossible. I put in about 16 hours of exploring and detecting on the tailings. Covered a wide variety of terrain and tailings, new, old, tall, short, and along some bedrock sections.
      On to the Equinox: I tried both Park 2 and the Gold 1 settings.  Obviously, my ear is not tuned to the Gold 1 program, it was providing way more chatter than I could process, even with sensitivity turned down to 15 or so.  I would have turned it down more but I could run in Park 2 at 20-22 sensitivity and thought I may miss more in Gold 1.  I was using the 11” stock coil.
      Is it normal to have to run at a much lower sensitivity in the gold modes?
      Most of the time I ended up running in Park 2 with -7,-8,-9 turned off, which may have been a mistake. With how worked the area is, the best chance is probably digging all the iron and hoping for a nugget that might be masked by the trash.
      In one area I did have some trouble with hot rocks, they would sound as a fairly small but round 12 with iron nearby but after digging out would end up as a -6 hot rock.  Was curious why it read so high.
      All in all a great trip.  No gold, and not much wildlife but got a nice shot of a Short-eared Owl on the drive out the Taylor Hwy.   Photos of finds, handful of magnetic nuggets, close up of the non magnetic nugget (maybe lead or silver?) 






    • By wwace
      Year #2 of Covid is shaping up to be worse than #1 so I have decided to go mining/prospecting which should use up the rest of my cash reserve. The question is where do I go? I can't really afford to do the typical tourist areas and can't afford anything like a Gaines Creek trip. So this leaves me tied to the road system.
      What is the best choice, look for unclaimed spots? Try to find someone who will let you work their claims? Hit the public areas? There are millions of yards of tailings, does everyone expect you to get permission to detect something dredged in the 20s? Once you get out there and see something you want to hit you would have to go back to where you have internet and try to find if it still has a valid claim and try to call the owners, I would never get anything done.
      I have VLF detectors if nugget hunting is possible but need a PI to cover hotter spots. I have a Proline 2.5 in combo highbanker and plenty of pans, sluices, tools etc.
      Want to try Chicken Area and Petersville, Should we look North of Fairbanks as well or someplace else? Stay home and detect tot lots?
       
      ww
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